Not really. You have a monster that is intelligent enough to use traps and terrain to their advantage, which means that they will invariably be deadlier than a monster who just engages in a slugfest--which, I would hazard to guess, is the way that a sizable percentage of DMs run their encounters. It doesn't matter if this is a pack of kobolds who uses traps and guerrilla warfare, or a dragon who stays in the air instead of sitting on the ground using a claw/claw/bite routine. With 5e's bounded accuracy, this is even more the case, since those kobolds could probably cause a lot of harm to even very high-leveled PCs. Could they kill them? Maybe, maybe not, but they can certainly cause a bigger resource drain than their CR would suggest.
Which makes calculating them according to the "6-8 medium encounters per adventuring day" rather pointless.